– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Fri 11 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Fri 11 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Warm (max 21°C on Sat afternoon, min 10°C on Sun night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 23°C on Wed afternoon, min 10°C on Mon morning). Wind will be generally light. | |||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | |  |  | |  | | | |  |  | | | |
cloudy | cloudy | cloudy | some clouds | some clouds | light rain | some clouds | rain shwrs | rain shwrs | rain shwrs | light rain | rain shwrs | some clouds | some clouds | clear | clear | clear | clear | |
Cloud base (m) | 6550 | 5800 | 4650 | 4100 | 3350 | 3350 | 700 | 900 | 1550 | 800 | 800 | 2350 | 2100 | 2400 | ||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | 0.1 | — | 0.4 | 0.3 | 0.1 | 0.6 | 0.1 | — | — | — | — | — | — |
max °C | 14 | 17 | 15 | 19 | 21 | 16 | 13 | 14 | 12 | 12 | 12 | 11 | 15 | 19 | 14 | 20 | 23 | 17 |
min °C | 11 | 17 | 14 | 15 | 21 | 11 | 11 | 14 | 10 | 10 | 12 | 10 | 11 | 18 | 13 | 15 | 22 | 17 |
chill °C | 11 | 17 | 14 | 15 | 21 | 11 | 11 | 14 | 10 | 10 | 12 | 10 | 11 | 18 | 13 | 15 | 22 | 17 |
Freezing level m | 2650 | 2850 | 2950 | 3000 | 3050 | 2950 | 2800 | 2600 | 2550 | 3150 | 2850 | 2500 | 2800 | 3400 | 3600 | 3800 | 4000 | 4100 |
 | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — |
 | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Warm (max 21°C on Sat afternoon, min 10°C on Sun night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Warm (max 23°C on Wed afternoon, min 10°C on Mon morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.